Centrifugal pump.



PATENTED OCT. 25, 1904.

I. C. WILLIAMS.

GBNTRIFUGAL PUMP.

APPLICATION FILED JAN. 3, 1904.

2 SHBETSrSHEET 1.

N0 MODEL;

a llj mjlor W HIDZSSQS I No. 772,989. PATENTED OCT. 25; 1904. I

' I. G. WILLIAMS.

GENTRIPUGAL PUMP.

APPLICATION FILED JAN. 8, 1904.

N0 MODEL. I

2 SHEETS-SHEET 2.

Nofimiaeea UNITED STATES Y Patented October 25, 1904.

PATE T OFFICE.

IRVIN C. WILLIAMS, OF JOHNSONBURG, PENNSYLVANIA, ASSIGNOR OF ONE-HALF TOJOHN ALEXANDER CRAIG, OF J OHN SONBURG, PENN SYLVAN IA.

CENTRIFUGAL PUMP.

i SPECIFICATION forming part of Letters Patent N0. 772,989, datedOctober 25, 1904.

Application filed January 8, 1904.

T0 aZZ whom, zit may concern:

Be it known that I, IRvIN C. WILLIAMS, a citizen of the United States,residing at J ohnsonburg, in the county of Elk and State ofPennsylvania, have invented a new and useful Centrifugal Pump, of whichthe following is a specification.

This invention relates to centrifugal pumps, and has for its principalobject the provision of a centrifugal pump adapted for operation inpumping. liquids and semiliquid masses, such as paper stock, which shallbe of simple and durable construction, thoroughly effective inoperation, and susceptible of use as a right or left hand pump, as maybe desired.

Afurther object of the invention is to provide a pump of the characterspecified in which the casing of the rotary piston is so mounted as tobe readily adjustable to discharge at either side and at any desiredinclination.

A further object of the invention is to provide,in a pump of thecharacter specified,im proved means for imparting movement to thepump-shaft and to provide an improved form of bearing for the pump-shaftby means of which the shaft maybe kept lubricated and the frictionofoperation diminished.

In attaining the several objects above mentioned and others, which willappear as the invention is more fully disclosed, I prefer to make use ofthe novel construction, and combination of parts of a centrifugal pumphereinafter fully described,illustrated-in preferred form in theaccompanying drawings, and having the novel features thereofparticularly pointed out in the appended claims.

In the drawings, Figure 1 is a viempartly in elevation and partly inlongitudinal section in the vertical plane, of a pump constructed inaccord with this invention- Fig. 2 is a view in section on the planeseparating the two members of the piston-casing. Fig. 3 is aview in sideelevation of the piston detached. Fig. 4 is a view in front elevation ofthe'piston with the plate detached from the piston. Fig. 5 is a view ofthe plate which is bolted to the front of the piston and forms a partthereof. Fig. (Us a side vview Serial No. 188,235- (No model.)

of a bushing forthe pump-shaft. Fig. 7 is a transverse section throughthe bushing midway between its ends. Referring to the drawings, in whichcorresponding parts are designated by similar characters of reference, 1designates the bed upon which the pump structure is mounted, and in thepresent instance the bed consists of a casting of rectangularcross-section providedwith perforated lugs on the sides for thereception ofbolts or screws by means of which the bed may be securedupon a floor or other suitable support. At one end of the bed there isrigidly secured thereon, as by bolts or other suitable fastening means,a bracket 2, having an opening thercthrough for the reception of acasting 3, which is adjustably secured in said opening by means ofSQt-SCIBWS' L, mounted in the upper portion of the bracket. The casting3 consists of a stuffing-box 5, which fits within the opening providedtherefor in the bracket 2, a boxing 6 at the end of the stuflingsbox,and a flange 7 at the juncture of the stuffing-box 5. The flange 7 israbbeted upon the face adjacent to the stuffing-box and is provided nearthe margin with a series of holes to receive'bolts by which the casing 8of the pump is .securely fastened to the casting 3. The casing 8 iscomposed of two members 10 and 10, which are complementary to each otherand are secured together by means of bolts passing through webs formedat the margins of the said members. The casing8 is provided upon eitherside with a central opening surrounded by a flange, the flange upon oneside of the casing being brought into contact with the flange on'the'casting 3 and rigidly secured thereto by means of bolts. Upon theopposite side of the casing the flange forms the means for securing tothe casing an internally-threaded collar 11 for the attachment of apipe, hose, or other conduit through which the material pumped may bedrawn! The opening withthe collar 11 secured thereon will hereinafter bereferred to as the inletopening. At diametrically opposite pointsparallel discharge-pipes 13 and 14 extend tangentially from the casing,one of said discharge-pipes being ordinarily closed by means of a plate15 bolted over the end of the pipe and the other being ordinarilyprovided with an internally-tlneaded collar for the attachment of apipe, hose, or other conduit to conduct material from the pump.

Behind the bracket 2 upon the bed 1 are mounted two pillow-blocks orbearing-standards 16 to support a pump-shaft 17. Each of thepillow-blocks has formed in the top thereof a semicircular groove forthe reception of a bushing 19, which forms a lubricatingbearing for theshaft. The bushings 19 are preferably formed of spring-brass, and eachone is provided intermediate of its ends with an external annular grooveor channel 20, which corresponds in position to a chamber 21, formed inthe grooved upper surface of the pillow-block. Each of the bushings isalso provided at its ends with annular shoulders to prevent longitudinalmovement of the bushings in the pillow-blocks, and in order tofacilitate the passage of lubricant into the interior of the bushing aplurality of perforations 22 are formed in the wall of the bushing whereit is externally channeled. The bushings being made of spring-brassnormally take the form shown in Fig. 6, in which the slot 23, extendinglongitudinally of each bushing, is open. WVhen the bushings are fittedaround the shaft 17 and clamped in semicircular grooves at the top ofthe pillowblocks, the bushings are compressed sufficiently to close theslots 23. The bushings are secured in position in the upper ends of thepillow-blocks by means of caps 24, grooved to correspond to the groovesin the pillow-blocks and provided on top with oil-receiving cavities 25,in which, if preferred, lubricators of any preferred structure may besecured. Oil-holes 26 extend from the bottom of said oil-receivingcavities into the groove on the under surface of each cap, said groovesbeing provided with oil-chambers corresponding to those formed in thepillow-blocks. Upon the end of the shaft within the casing a rotarypiston 30 is rigidly mounted. The piston 30 is preferably composed offour radially-disposed wings'31 and a web 32 of circular contour castintegral with the wings at the rear face of the piston, the Web having adiameter a little less than the distance between the ends ofoppositely-disposed wings. Upon the front face of the piston, oppositethe web 32, there will preferably be bolted a plate 33, whose diameteris substantially equal to that of the web and which is provided at thecenter with an opening 3% to permit the passage of the material pumpedinto the space between the plate and the Web. The piston is of course ofsuch dimensions that the wings thereof will barely escape contact withthe wall of the casing in which the piston revolves, and the ends of thewings are rounded to conform to the shape of the chamber formed withinthe casing. Each of the wings is generally of fusiform contour and isconsequently adapted to produce the same effect when the piston isrotated to right or left. The sides of the wings are preferably concavednear their outer ends, as shown in F 3.

The peculiar formation of the wings of the piston set forth in thepreceding paragraph is designed to increase the eiiiciency of theoperation of the piston by adapting it to act equally well when rotatedto the right or left and also to make it more effective in operationupon semiliquid materials, such as paper-pulp, or upon liquidscontaining massive solid bodies. The concavities in the sides of thepiston-wings near their outer ends are efficacious in directing solidmasses contained in the liquids passing through the pump into the medianplane between the two sections of the pump-casing, and so diminishing ina measure the friction of operation of the pump, as well as tending toprevent the clogging of the pump through the jamming of the solidparticles between the ends of the piston-wings and the inner surface ofthe piston-casing.

The means employed for driving the pumpshaft may be a motor of anysuitable character, and power is preferably imparted from the motor tothe shaft by means of a belt running over a pulley 35, secured upon theshaft between the pillow -blocl s 24-. The pulley 35 is approximatelycylindrical in form, as shown, but is of slightly larger diameter in themiddle than at the ends. The surface of the pulley is not smooth, but isprovided with a plurality of small circumferential grooves 36, which arearranged sufliciently close together to prevent adhesion of the belt tothe pulley through the action of the atmospheric pressure upon thesurface of the belt. The movement of the shaft is steadied by means of abalance-wheel 37, secured upon the end of the shaft opposite the rotarypiston, and the balance -whcel also serves the subsidiary purpose ofbalancing the weight of the piston upon the other end of the shaft. Inorder to cooperate with the stufiing-box formed in the casting 3, thereis preferably mounted on the shaft adjacent thereto a gland consistingof complementary members 38 39, which are bolted together, as shown, andare rigidly connected with the casting 3 by means of long bolts 40passing through flanges 41 fornicd at the ends of the members 38 and 39most remote from the casting 3.

From the foregoing description the operation of the pump may be easilyunderstood. The supply pipe or tube being connected with the collar 11and the conduit for removing the material from the pump being secured inthe collar 15 at the end of the open discharge-pi e the rotary movementof the piston when power is transmitted to the pulley 35 in the properdirection will draw the liquid or semiliquid site sides of thepiston-casing the cleaning of masses to be pumped through thesupply-pipe into the casing and through the opening 34 in the plate 38into the space between said plate and the web 82. The centrifugal actionof the'pump will then throw the material pumped outward toward theperiphery of the casing and cause it to escape through the opendischarge-pipe.

' The pump has been illustrated as arranged to act'as a "right-handpump-that is to say, the pump is illustrated as arranged for operationwith the piston rotating in the same di rection as the hands of a clock.If,-however, it is desired to operate the pump in the oppositedirection, the di'scharge-pipe shown as open in the drawings may beclosed and the closed discharge-pipe may be opened. Then the pump willbe adapted for operation as a left-hand pump without further change. Byproviding two discharge-pipes at oppothe casing or entrance thereintofor the purpose of making repairs is greatly facilitated. As will beobvious, when the pump is operatively connected with the inlet-pipe andthe outlet-pipe entrance to the interior of the piston-casing may beeifected without disarranging the pump connections in any way by simplyremoving the plate 15 over the dischargepipe 14.

In order to change the angle of discharge, the only adjustment necessaryis to loosen the set-screws 4 in the top of the bracket 2 topermit therotation of the casting 3,,to which the pump-casing Sis bolted. When thecasing has been set in exactly the position desired, the set-screws maybe again brought into operative engagement with the casting, and thepumpwill be ready'for operation.

While I have described the preferred form of embodiment of my invention,it is to be understood that various changes in the form,

proportions, and exact mode of assemblage of the elements exhibited maybe made without departing from the spirit of the invention orsacrificing the advantages thereof, and I do not wish to be limited tothe precise details of constructiondescribed and shown.

Having thus described the construction and operation of my invention,what I claim as new, and desire to secure by Letters Patent, 1s

1. In a centrifugal pump, an adjustable pump-casing having a centralinlet and a pair of outlets,,the outlets being disposed tangent to theperiphery of the casing at opposite sides thereof and extending outwardin parallel directions, and a piston mounted for rotation withinsaidcasing and comprising a plurality of radially-arranged fusiform wingshaving their ends disposed in close proximity to the inner surface ofsaid casing and a rigid web connecting said wings at the back.

2. In a centrifugal pump, a casing presenting a chamber of circularcontour having a central inlet-opening, and a piston arranged forrotation in said casing, said piston comprising a plurality ofradially-arranged fusiform wings having a web connecting said wings atthe back, and a plate having a central opening secured upon the frontface of said wings. I

3. In a centrifugal pump, a casing having a piston-chamber therein ofsuitable circular contour and having a central inlet-opening,

and a piston arranged for rotation withinsaid casing, said pistoncomprising a plurality of fusiform wings presenting concavities on bothsides near the outer ends, a web secured upon the back of said wings,and a plate having a central opening secured upon the frontof saidwings- I In testimony that 1 claim the foregoing as my own I have heretoaffixed my signature in the presence of two witnesses.

.IRVIN O. WILLIAMS.

Witnesses:

- H. L. BAYLEss, F. W. BAYLEss.

